<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>登录</title>
</head>
<body>

    <form action="" method="post">

        <p>
            user name <input type="text" name="username">
        </p>

        <p>
            password <input type="password" name="password">
        </p>

        <p>
            <button>登录</button>
        </p>
        
    </form>

</body>
</html>